Problems
181
6.5 Verify (6.92).
6.6 Verify (6.99) and (6.100).
6.7 Show that the contribution of the contractions (6.88) to the S-matrix
element (6.74) is given by (6.101).
6.8 Consider the case of equal masses m A = m B = m C . Evaluate u of (6.104)
in the CM frame (compare section 1.3.6), and show that u ≤ 0, so that u
2
can never equal m in (6.100). (This result is generally true for such single
C
particle ‘exchange’ processes.)
6.9 Verify (6.112).
181
6.5 Verify (6.92).
6.6 Verify (6.99) and (6.100).
6.7 Show that the contribution of the contractions (6.88) to the S-matrix
element (6.74) is given by (6.101).
6.8 Consider the case of equal masses m A = m B = m C . Evaluate u of (6.104)
in the CM frame (compare section 1.3.6), and show that u ≤ 0, so that u
2
can never equal m in (6.100). (This result is generally true for such single
C
particle ‘exchange’ processes.)
6.9 Verify (6.112).